CN217936030U - Low-power feedback type light source control module - Google Patents
Low-power feedback type light source control module Download PDFInfo
- Publication number
- CN217936030U CN217936030U CN202221442966.7U CN202221442966U CN217936030U CN 217936030 U CN217936030 U CN 217936030U CN 202221442966 U CN202221442966 U CN 202221442966U CN 217936030 U CN217936030 U CN 217936030U
- Authority
- CN
- China
- Prior art keywords
- light source
- unit
- feedback
- control unit
- mcu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a photoelectric detection uses technical field, specifically is a miniwatt feedback type light source control module, and this module includes: MCU the control unit, light source drive unit, light source feedback constant temperature are taked care of unit, AD the sampling unit, wherein: the light source driving unit is connected with the MCU control unit through the PWM output and is used for controlling the on/off of the light source and the brightness adjustment of the light source; the light source feedback constant temperature conditioning unit is connected with the MCU control unit through a GPIO interface and is used for controlling the on/off of the refrigerating sheet and the heating/refrigerating conversion of the refrigerating sheet through the IO high-low level change; the AD sampling unit is connected with the light source driving unit through a GPIO interface and used for obtaining a light intensity feedback value of the light source and an environment temperature value of the photodiode. The low-power feedback type light source control module effectively solves the problem that light sources are unstable due to light attenuation and the like caused by constant-voltage or constant-current driving of the light sources.
Description
Technical Field
The utility model relates to a photoelectric detection uses technical field, specifically is a miniwatt feedback type light source control module.
Background
In the photoelectric signal test work of portable detection equipment, it is usually necessary to provide a stable light source output, and a conventional light source adopts a constant voltage or constant current driving mode, and the output light intensity of the light source may be attenuated or shifted and changed under the condition of environmental temperature change or long working time. In view of this, we propose a low-power feedback type light source control module, which uses the working principle of optical feedback and performs constant temperature control on the photo-electric detection circuit, and aims to provide stable environmental conditions for light intensity detection of the light source, thereby providing control stability of the light source and providing stable and continuous light source output for the detection equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a miniwatt feedback type light source control module to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a low-power feedback light source control module, the module comprising: MCU the control unit, light source drive unit, light source feedback constant temperature are taked care of unit, AD the sampling unit, wherein:
the light source driving unit is connected with the MCU control unit through PWM output and is used for controlling the on/off of the light source and the brightness adjustment of the light source;
the light source feedback constant temperature conditioning unit is connected with the MCU control unit through a GPIO interface and is used for controlling the on/off of the refrigerating sheet and the heating/refrigerating conversion of the refrigerating sheet through the IO high-low level change;
the AD sampling unit is connected with the light source driving unit through a GPIO interface and used for obtaining a light intensity feedback value of the light source and an ambient temperature value of the photodiode.
Preferably, the system further comprises an upper computer, wherein the upper computer is connected with the MCU control unit through a UART1 interface and is used for sending a light source brightness control instruction to the MCU control unit.
Compared with the prior art, the beneficial effects of the utility model are that: the low-power feedback type light source control module detects the light intensity of the photodiode under the constant temperature condition of the working environment of the photodiode by acquiring the light intensity feedback value of the light source and the ambient temperature value of the photodiode, directly controls the brightness of the light source according to the light intensity feedback, and effectively solves the problem of unstable light sources such as light attenuation caused by driving the light source with constant voltage or constant current.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic circuit diagram of the MCU control unit of the present invention;
fig. 3 is a schematic circuit diagram of the light source driving unit according to the present invention;
FIG. 4 is a schematic circuit diagram of the constant temperature conditioning unit with light source feedback according to the present invention;
fig. 5 is a schematic circuit diagram of the AD sampling unit of the present invention.
In the figure: 1. an MCU control unit; 2. a light source driving unit; 3. a light source feedback constant temperature conditioning unit; 4. an AD sampling unit; 5. and an upper computer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a miniwatt feedback type light source control module, as shown in FIG. 1 is the utility model discloses an overall structure schematic block diagram, this module includes: MCU the control unit 1, light source drive unit 2, light source feedback constant temperature conditioning unit 3, AD sampling unit 4, wherein: the light source driving unit 2 is connected with the MCU control unit 1 through PWM output and is used for controlling the on/off of the light source and the brightness adjustment of the light source; the light source feedback constant temperature conditioning unit 3 is connected with the MCU control unit 1 through a GPIO interface and is used for controlling the on/off of the refrigeration piece and the heating/refrigeration conversion of the refrigeration piece through the IO high-low level change; the AD sampling unit 4 is connected with the light source driving unit 2 through a GPIO interface and used for obtaining a light intensity feedback value of the light source and an environment temperature value of the photodiode. Therefore, the low-power feedback type light source control module utilizes the AD sampling unit 4 to collect the light intensity feedback value of the light source and the ambient temperature value of the photodiode, carries out light intensity detection under the constant temperature condition of the working environment of the photodiode, directly controls the brightness of the light source according to the light intensity feedback, and effectively solves the problem of unstable light sources such as light attenuation and the like caused by driving the light source by constant voltage or constant current.
Further, still include host computer 5, and host computer 5 passes through UART1 interface connection MCU the control unit 1 for send light source luminance control instruction to MCU the control unit 1, be convenient for can make operating personnel manually send control instruction through the host computer and control the luminance of light source.
Further, as shown in fig. 2, the schematic circuit diagram of the MCU control unit is mainly composed of a GD32F103RCT6 single chip microcomputer U1, an active clock crystal oscillator U2, a start selection resistor R1/R6, and a program download interface SWD1, and the circuit principle of the MCU control unit is the prior art, and can be completely implemented by those skilled in the art without additional remarks.
It should be noted that, as shown in fig. 3, the schematic circuit diagram of the light source driving unit mainly includes a current-limiting power resistor R2, a switching MOS transistor Q1 (SM 3024 NSU) and a resistor R3, and performs power amplification on the PWM control signal output by the MCU control unit, so as to control the light source to be turned on, turned off and adjusted in brightness.
Specifically, as shown in fig. 4, the circuit schematic diagram of the light source feedback constant temperature conditioning unit mainly includes a photodiode D2, an I-V conversion circuit, an H-bridge drive, a refrigeration plate, and a temperature measuring bridge, and is used for maintaining the constant temperature of the working environment of the photodiode and conditioning the output signal of the photodiode, the photodiode D2 is selected from S2833-04, and light emitted by the light source irradiates the photosensitive surface of the photodiode to generate photocurrent; the I-V conversion circuit consists of a precision operational amplifier LMC6084 and a peripheral resistor-capacitor and converts the photocurrent of the photodiode into voltage for output; the H-bridge drive uses an L298P chip and can output forward voltage, direction voltage or turn-off voltage under the action of a control signal; the refrigerating sheet is of an RC12-6 model, one side of the refrigerating sheet is attached to the photodiode and the I-V conversion circuit through heat-conducting silicone grease, the other side of the refrigerating sheet is provided with a 20W aluminum radiator, and the photodiode and the I-V conversion circuit are subjected to 30-DEG C constant temperature control under the action of an H-bridge driving signal; the temperature measuring bridge is composed of a thermistor PT1000 and a resistor and is used for converting resistance value change of the thermistor to environmental temperature change into differential voltage change, so that the light source feedback constant temperature conditioning unit 3 adopts a refrigeration piece constant temperature control method to carry out constant temperature control on the working environment of the whole I-V circuit at 30 ℃, and the stability of photoelectric conversion of the photodiode is ensured. The circuit principle of the light source feedback thermostatic conditioning unit is the prior art and can be fully realized by those skilled in the art without exception.
In addition, as shown in fig. 5, the circuit schematic diagram of the AD sampling unit is mainly composed of a conversion chip AD7705, a voltage reference chip MAX6225 and a peripheral capacitor, and is used for sampling a thermal resistance voltage signal and an output signal of the I-V conversion circuit. The AD7705 is connected with the MCU control unit through the SPI interface, the voltage reference chip provides 2.5V voltage reference for the AD7705, the AD sampling unit 4 has wide adjusting capacity for light source feedback detection, PGA gain of the AD sampling unit is 1-128 adjustable, and adaptability to light source brightness range detection is strong. The circuit principle of the AD sampling unit 4 is prior art and can be implemented completely by a person skilled in the art without further remarks.
When the low-power feedback type light source control module is used, the light intensity detection is carried out under the constant temperature condition of the working environment of the photodiode by collecting the light intensity feedback value of the light source and the ambient temperature value of the photodiode, the brightness of the light source is directly controlled according to the light intensity feedback, and the problem of instability of the light source such as light attenuation caused by driving the light source by constant voltage or constant current is effectively solved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A low-power feedback light source control module, comprising: MCU the control unit (1), light source drive unit (2), light source feedback constant temperature are taked care of unit (3), AD sampling unit (4), wherein:
the light source driving unit (2) is connected with the MCU control unit (1) through PWM output and is used for controlling the on/off of a light source and the brightness adjustment of the light source;
the light source feedback constant temperature conditioning unit (3) is connected with the MCU control unit (1) through a GPIO interface and is used for controlling the on/off of the refrigeration piece and the heating/refrigeration conversion of the refrigeration piece through the IO high and low level change;
the AD sampling unit (4) is connected with the light source driving unit (2) through a GPIO interface and used for obtaining a light intensity feedback value of a light source and an environment temperature value of a photodiode.
2. The small-power feedback light source control module according to claim 1, wherein: the LED lamp is characterized by further comprising an upper computer (5), wherein the upper computer (5) is connected with the MCU control unit (1) through a UART1 interface and used for sending a light source brightness control instruction to the MCU control unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221442966.7U CN217936030U (en) | 2022-06-08 | 2022-06-08 | Low-power feedback type light source control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221442966.7U CN217936030U (en) | 2022-06-08 | 2022-06-08 | Low-power feedback type light source control module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217936030U true CN217936030U (en) | 2022-11-29 |
Family
ID=84180240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221442966.7U Active CN217936030U (en) | 2022-06-08 | 2022-06-08 | Low-power feedback type light source control module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217936030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543788A (en) * | 2024-01-09 | 2024-02-09 | 山东寿光市坤隆石油机械股份有限公司 | New forms of energy screw pump power supply control system |
-
2022
- 2022-06-08 CN CN202221442966.7U patent/CN217936030U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543788A (en) * | 2024-01-09 | 2024-02-09 | 山东寿光市坤隆石油机械股份有限公司 | New forms of energy screw pump power supply control system |
| CN117543788B (en) * | 2024-01-09 | 2024-04-02 | 山东寿光市坤隆石油机械股份有限公司 | New forms of energy screw pump power supply control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6157119B2 (en) | Wake-up of light sensor in lighting equipment | |
| CN217936030U (en) | Low-power feedback type light source control module | |
| CN202991562U (en) | Intelligent fan control system based on single chip microcomputer | |
| CN105228312A (en) | A kind of intelligent control system of LED illumination | |
| CN205029938U (en) | Intelligence control system of LED illumination | |
| CN115047925B (en) | Passive radiation type constant temperature control system and control method based on PID controller | |
| CN110769547A (en) | Lamp control method, device and system | |
| CN108738200A (en) | Color temperature adjustment device, the system and method for lamp group | |
| CN108770129B (en) | Acousto-optic induction intelligent lighting system | |
| CN208707988U (en) | Lamps and lanterns and lighting system | |
| CN204392650U (en) | Multifunctional intelligent desk lamp | |
| CN215450005U (en) | High-power constant temperature control system based on TEC | |
| CN203690702U (en) | Laser tube driving circuit for infrared sensor | |
| CN212137981U (en) | Intelligent lighting system based on illuminance sensor | |
| CN210124031U (en) | LED lighting system capable of adaptively adjusting light according to ambient illumination | |
| CN210298137U (en) | LED lamp control system | |
| CN206620336U (en) | A kind of intelligent illuminating system | |
| CN217183512U (en) | Adjustable constant current drive circuit | |
| CN217055660U (en) | Fan controller with fan fault detection function | |
| CN216646411U (en) | Wall dress air quality detector | |
| CN213783663U (en) | Energy-saving lamp lighting scene intelligent setting device based on Internet of things | |
| CN220857217U (en) | Laser constant output power control system and laser | |
| CN220173452U (en) | Energy-saving control device | |
| CN220985114U (en) | TEC drive circuit | |
| CN109623094A (en) | One kind is matched based on ARM, arc welding robot applies welding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |